Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 10 of 10 for “"Hidden sector"”.
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Hidden Sector: Three Different Ways
… that explore the consequences of different Hidden Sector models in various experimental fields. The first project proposes the Hidden Sector is populated by just one U(1) vector particle. It couples to the Standard Model through kinetic mixing and is responsible for a fraction of Dark Matter …
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Cosmology of hidden sector with Higgs portal
… are investigating cosmological implications of hidden sector models which involve scalar fields that do not interact with the Standard Model gauge interactions, but couple directly to the Higgs field. We particularly focus on their relic particle density as a candidate for dark matter. For the …
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PHENOMENOLOGY OF THE STANDARD MODEL AND BEYOND
… One promising class of BSM theories involves “Hidden Sectors”, which are newparticles and interactions that are singlets under SM gauge symmetries. While minimal hidden sector scenarios have been widely studied, models with non-minimal field content and richer dynamics remain less explored. In …
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Spectral and Superpotential Effects in Heterotic Compactifications
… stabilization mechanism associated to certain hidden sector gauge bundles. Once this foundational material has been presented, we move on to the original research of this disser- tation. We present a scan over all known heterotic line bundle standard models to examine the frequency with which …
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Initial systematic investigations of the weakly coupled free fermionic heterotic string landscape statistics.
… with "mirroring" — identical observable and hidden sector gauge groups and matter representations.
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Duality and Models of Supersymmetry Breaking
… without the need for an additional messenger sector. A reasonable choice of parameters leads to gaugino masses of the right order. To further explore the phenomenology of metastable susy breaking we distinguish different types of models by the manner in which R-symmetry is broken in the …
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Obstacles to realizing Quintessence from String Theory
… Introducing an appropriate SUSY-breaking hidden sector on the standard-model brane then leads to a large positive F-term contribution to the scalar potential that cannot be canceled by the known negative terms and thus significantly raises the vacuum energy. To cancel the F-term, it would …
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The harp in early nineteenth-century Britain : innovation, business, and making in Jacob Erat’s manufactory
… in relation to one another, revealing a hitherto hidden sector of London industry. Forensic analysis of financial accounts (constituting a pioneering big-data study of an instrument) reveals new information about the harp, demonstrating how statistical methods can enrich organology, design …
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Supersymmetry Breaking: Models of Gauge Mediation with Gauge Messengers
… consider a particular example, where we study a hidden sector model with SU(3) gauge group, two flavours of quarks and one singlet. The superpotential is the most general consistent with the tree-level symmetries. The R-symmetry is anomalous, however, but one can still derive selection rules that …
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Searching for signs of hidden sectors at the LHC: long-lived particle methods and models
… theories of new long-lived particles (LLPs) in hidden sectors, but in practice the current search program may miss key data, especially for MeV-GeV range masses of transverse-boosted LLPs. The high-luminosity Large Hadron Collider (HL-LHC) will produce more data than any previous LHC run with a …